a3082c9d90
This patch adds support for constant propagation of individual structure members through Phi nodes. Each member is handled independently, allowing optimization opportunities when specific members become constant. Also, update the testcase since we are able to optimize the call parameter now.
197 lines
6.0 KiB
LLVM
197 lines
6.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt %s -passes=ipsccp -S | FileCheck %s
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declare i1 @cond()
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declare void @use(i1)
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define internal {i64, i64} @struct1() {
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; CHECK-LABEL: @struct1(
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; CHECK-NEXT: [[C:%.*]] = call i1 @cond()
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; CHECK-NEXT: br i1 [[C]], label [[TRUE:%.*]], label [[FALSE:%.*]]
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; CHECK: true:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: false:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[R:%.*]] = phi { i64, i64 } [ { i64 20, i64 200 }, [[TRUE]] ], [ { i64 30, i64 300 }, [[FALSE]] ]
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; CHECK-NEXT: ret { i64, i64 } [[R]]
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;
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%c = call i1 @cond()
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br i1 %c, label %true, label %false
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true:
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%s.1 = insertvalue {i64, i64} undef, i64 20, 0
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%s.2 = insertvalue {i64, i64} %s.1, i64 200, 1
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br label %exit
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false:
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%s.3 = insertvalue {i64, i64} poison, i64 30, 0
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%s.4 = insertvalue {i64, i64} %s.3, i64 300, 1
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br label %exit
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exit:
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%r = phi {i64, i64} [ %s.2, %true], [ %s.4, %false ]
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ret {i64, i64} %r
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}
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define void @struct1_caller() {
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; CHECK-LABEL: @struct1_caller(
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; CHECK-NEXT: [[S:%.*]] = call { i64, i64 } @struct1()
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; CHECK-NEXT: [[V1:%.*]] = extractvalue { i64, i64 } [[S]], 0
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; CHECK-NEXT: [[V2:%.*]] = extractvalue { i64, i64 } [[S]], 1
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[T_3:%.*]] = icmp eq i64 [[V1]], 20
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; CHECK-NEXT: call void @use(i1 [[T_3]])
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[T_6:%.*]] = icmp eq i64 [[V2]], 300
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; CHECK-NEXT: call void @use(i1 [[T_6]])
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; CHECK-NEXT: ret void
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;
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%s = call {i64, i64} @struct1()
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%v1 = extractvalue {i64, i64} %s, 0
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%v2 = extractvalue {i64, i64} %s, 1
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%t.1 = icmp ne i64 %v1, 10
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call void @use(i1 %t.1)
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%t.2 = icmp ult i64 %v1, 100
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call void @use(i1 %t.2)
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%t.3 = icmp eq i64 %v1, 20
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call void @use(i1 %t.3)
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%t.4 = icmp ne i64 %v2, 0
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call void @use(i1 %t.4)
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%t.5 = icmp ult i64 %v2, 301
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call void @use(i1 %t.5)
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%t.6 = icmp eq i64 %v2, 300
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call void @use(i1 %t.6)
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ret void
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}
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define internal {i64, i64} @struct2() {
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; CHECK-LABEL: @struct2(
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; CHECK-NEXT: [[C:%.*]] = call i1 @cond()
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; CHECK-NEXT: br i1 [[C]], label [[TRUE:%.*]], label [[FALSE:%.*]]
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; CHECK: true:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: false:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[V1:%.*]] = phi i64 [ 20, [[TRUE]] ], [ 30, [[FALSE]] ]
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; CHECK-NEXT: [[V2:%.*]] = phi i64 [ 200, [[TRUE]] ], [ 300, [[FALSE]] ]
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; CHECK-NEXT: [[S_1:%.*]] = insertvalue { i64, i64 } poison, i64 [[V1]], 0
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; CHECK-NEXT: [[S_2:%.*]] = insertvalue { i64, i64 } [[S_1]], i64 [[V2]], 1
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; CHECK-NEXT: ret { i64, i64 } [[S_2]]
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;
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%c = call i1 @cond()
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br i1 %c, label %true, label %false
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true:
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br label %exit
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false:
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br label %exit
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exit:
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%v1 = phi i64 [ 20, %true ], [ 30, %false ]
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%v2 = phi i64 [ 200, %true ], [ 300, %false ]
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%s.1 = insertvalue {i64, i64} poison, i64 %v1, 0
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%s.2 = insertvalue {i64, i64} %s.1, i64 %v2, 1
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ret {i64, i64} %s.2
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}
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define void @struct2_caller() {
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; CHECK-LABEL: @struct2_caller(
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; CHECK-NEXT: [[S:%.*]] = call { i64, i64 } @struct2()
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; CHECK-NEXT: [[V1:%.*]] = extractvalue { i64, i64 } [[S]], 0
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; CHECK-NEXT: [[V2:%.*]] = extractvalue { i64, i64 } [[S]], 1
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: [[C_1:%.*]] = icmp eq i64 [[V1]], 25
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; CHECK-NEXT: call void @use(i1 [[C_1]])
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; CHECK-NEXT: [[C_2:%.*]] = icmp ult i64 [[V1]], 25
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; CHECK-NEXT: call void @use(i1 [[C_2]])
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; CHECK-NEXT: [[C_3:%.*]] = icmp eq i64 [[V2]], 250
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; CHECK-NEXT: call void @use(i1 [[C_3]])
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; CHECK-NEXT: [[C_4:%.*]] = icmp ugt i64 [[V2]], 250
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; CHECK-NEXT: call void @use(i1 [[C_4]])
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; CHECK-NEXT: ret void
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;
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%s = call {i64, i64} @struct2()
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%v1 = extractvalue {i64, i64} %s, 0
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%v2 = extractvalue {i64, i64} %s, 1
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%t.1 = icmp ne i64 %v1, 10
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call void @use(i1 %t.1)
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%t.2 = icmp ult i64 %v1, 100
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call void @use(i1 %t.2)
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%t.3 = icmp ne i64 %v2, 0
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call void @use(i1 %t.3)
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%t.4 = icmp ult i64 %v2, 301
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call void @use(i1 %t.4)
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%f.1 = icmp eq i64 %v1, 10
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call void @use(i1 %f.1)
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%f.2 = icmp ult i64 %v1, 19
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call void @use(i1 %f.2)
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%f.3 = icmp eq i64 %v2, 50
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call void @use(i1 %f.3)
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%f.4 = icmp ugt i64 %v2, 301
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call void @use(i1 %f.4)
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%c.1 = icmp eq i64 %v1, 25
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call void @use(i1 %c.1)
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%c.2 = icmp ult i64 %v1, 25
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call void @use(i1 %c.2)
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%c.3 = icmp eq i64 %v2, 250
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call void @use(i1 %c.3)
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%c.4 = icmp ugt i64 %v2, 250
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call void @use(i1 %c.4)
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ret void
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}
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%"phi_type" = type {i64, i64}
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define internal %"phi_type" @test(i32 %input) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: br label [[COND_TRUE_I:%.*]]
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; CHECK: cond.true.i:
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; CHECK-NEXT: br label [[COND_END_I:%.*]]
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; CHECK: cond.end.i:
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; CHECK-NEXT: ret [[PHI_TYPE:%.*]] poison
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;
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%cmp.cond = icmp eq i32 %input, 1
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br i1 %cmp.cond, label %cond.true.i, label %cond.false.i
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cond.true.i:
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%r1.tmp = insertvalue %"phi_type" poison, i64 1, 0
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%r1.tmp.2 = insertvalue %"phi_type" %r1.tmp, i64 2, 1
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br label %cond.end.i
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cond.false.i:
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%r2.tmp = insertvalue %"phi_type" poison, i64 3, 0
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%r2.tmp.2 = insertvalue %"phi_type" %r2.tmp, i64 4, 1
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br label %cond.end.i
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cond.end.i:
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%retval = phi %"phi_type" [ %r1.tmp.2, %cond.true.i ], [ %r2.tmp.2, %cond.false.i ]
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ret %"phi_type" %retval
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}
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define %"phi_type" @test2() {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[CALL_1:%.*]] = tail call fastcc [[PHI_TYPE:%.*]] @[[TEST:[a-zA-Z0-9_$\"\\.-]*[a-zA-Z_$\"\\.-][a-zA-Z0-9_$\"\\.-]*]](i32 noundef 1)
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; CHECK-NEXT: ret [[PHI_TYPE]] { i64 1, i64 2 }
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;
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%call.1 = tail call fastcc noundef %"phi_type" @test(i32 noundef 1)
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ret %"phi_type" %call.1
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}
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