13ffde316a
Remove compares after replacing all uses. Cleaning dead compares can enable additional simplifications when adjusting the position of the pass slightly. In particular, it seems like the additional dead instructions may prevent SimplifyCFG performing some folds. Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D158760
153 lines
6.3 KiB
LLVM
153 lines
6.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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define i1 @gep0_and_cmp(ptr readonly %src, ptr readnone %min, ptr readnone %max) {
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; CHECK-LABEL: @gep0_and_cmp(
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; CHECK-NEXT: check.0.min:
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; CHECK-NEXT: [[SRC_C:%.*]] = getelementptr i32, ptr [[SRC:%.*]], i64 0
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; CHECK-NEXT: [[MIN_C:%.*]] = getelementptr i32, ptr [[MIN:%.*]], i64 0
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; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr inbounds i32, ptr [[SRC]], i64 3
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; CHECK-NEXT: [[GEP_3_C:%.*]] = getelementptr i32, ptr [[GEP_3]], i32 0
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; CHECK-NEXT: [[C_MIN_0:%.*]] = icmp ult ptr [[SRC_C]], [[MIN_C]]
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; CHECK-NEXT: [[C_MAX_3:%.*]] = icmp ugt ptr [[GEP_3_C]], [[MAX:%.*]]
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; CHECK-NEXT: [[OR:%.*]] = or i1 [[C_MIN_0]], [[C_MAX_3]]
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; CHECK-NEXT: br i1 [[OR]], label [[TRAP:%.*]], label [[CHECKS:%.*]]
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; CHECK: trap:
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; CHECK-NEXT: ret i1 false
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; CHECK: checks:
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; CHECK-NEXT: [[C_3_MAX:%.*]] = icmp ult ptr [[GEP_3]], [[MAX]]
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; CHECK-NEXT: [[RES_1:%.*]] = xor i1 false, [[C_3_MAX]]
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; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr inbounds i32, ptr [[SRC]], i64 1
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; CHECK-NEXT: [[RES_2:%.*]] = xor i1 false, true
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; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr inbounds i32, ptr [[SRC]], i64 2
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; CHECK-NEXT: [[RES_3:%.*]] = xor i1 false, true
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; CHECK-NEXT: [[GEP_4:%.*]] = getelementptr inbounds i32, ptr [[SRC]], i64 4
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; CHECK-NEXT: [[C_4_MAX:%.*]] = icmp ult ptr [[GEP_4]], [[MAX]]
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; CHECK-NEXT: [[RES_4:%.*]] = xor i1 false, [[C_4_MAX]]
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; CHECK-NEXT: [[RES_5:%.*]] = xor i1 [[RES_1]], [[RES_2]]
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; CHECK-NEXT: [[RES_6:%.*]] = xor i1 [[RES_5]], [[RES_3]]
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; CHECK-NEXT: [[RES_7:%.*]] = xor i1 [[RES_6]], [[RES_4]]
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; CHECK-NEXT: ret i1 [[RES_7]]
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;
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check.0.min:
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%src.c = getelementptr i32, ptr %src, i64 0
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%min.c = getelementptr i32, ptr %min, i64 0
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%gep.3 = getelementptr inbounds i32, ptr %src, i64 3
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%gep.3.c = getelementptr i32, ptr %gep.3, i32 0
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%c.min.0 = icmp ult ptr %src.c, %min.c
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%c.max.3 = icmp ugt ptr %gep.3.c, %max
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%or = or i1 %c.min.0, %c.max.3
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br i1 %or, label %trap, label %checks
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trap:
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ret i1 0
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checks:
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%c.3.min = icmp ult ptr %gep.3, %min
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%c.3.max = icmp ult ptr %gep.3, %max
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%res.1 = xor i1 %c.3.min, %c.3.max
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%gep.1 = getelementptr inbounds i32, ptr %src, i64 1
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%c.1.min = icmp ult ptr %gep.1, %min
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%c.1.max = icmp ult ptr %gep.1, %max
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%res.2 = xor i1 %c.1.min, %c.1.max
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%gep.2 = getelementptr inbounds i32, ptr %src, i64 2
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%c.2.min = icmp ult ptr %gep.2, %min
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%c.2.max = icmp ult ptr %gep.2, %max
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%res.3 = xor i1 %c.2.min, %c.2.max
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%gep.4 = getelementptr inbounds i32, ptr %src, i64 4
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%c.4.min = icmp ult ptr %gep.4, %min
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%c.4.max = icmp ult ptr %gep.4, %max
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%res.4 = xor i1 %c.4.min, %c.4.max
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%res.5 = xor i1 %res.1, %res.2
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%res.6 = xor i1 %res.5, %res.3
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%res.7 = xor i1 %res.6, %res.4
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ret i1 %res.7
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}
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; Should not look through addresspacecast, because it may change the pointer
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; value.
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define i1 @addrspacecast_and_cmp(ptr readonly %src, ptr readnone %min, ptr readnone %max) {
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; CHECK-LABEL: @addrspacecast_and_cmp(
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; CHECK-NEXT: check.0.min:
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; CHECK-NEXT: [[SRC_C:%.*]] = addrspacecast ptr [[SRC:%.*]] to ptr addrspace(1)
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; CHECK-NEXT: [[MIN_C:%.*]] = addrspacecast ptr [[MIN:%.*]] to ptr addrspace(1)
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; CHECK-NEXT: [[MAX_C:%.*]] = addrspacecast ptr [[MAX:%.*]] to ptr addrspace(1)
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; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr inbounds i32, ptr [[SRC]], i64 3
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; CHECK-NEXT: [[GEP_3_C:%.*]] = addrspacecast ptr [[GEP_3]] to ptr addrspace(1)
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; CHECK-NEXT: [[C_MIN_0:%.*]] = icmp ult ptr addrspace(1) [[SRC_C]], [[MIN_C]]
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; CHECK-NEXT: [[C_MAX_3:%.*]] = icmp ugt ptr addrspace(1) [[GEP_3_C]], [[MAX_C]]
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; CHECK-NEXT: [[OR:%.*]] = or i1 [[C_MIN_0]], [[C_MAX_3]]
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; CHECK-NEXT: br i1 [[OR]], label [[TRAP:%.*]], label [[CHECKS:%.*]]
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; CHECK: trap:
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; CHECK-NEXT: ret i1 false
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; CHECK: checks:
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; CHECK-NEXT: [[C_3_MIN:%.*]] = icmp ult ptr [[GEP_3]], [[MIN]]
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; CHECK-NEXT: [[C_3_MAX:%.*]] = icmp ult ptr [[GEP_3]], [[MAX]]
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; CHECK-NEXT: [[RES_1:%.*]] = xor i1 [[C_3_MIN]], [[C_3_MAX]]
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; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr inbounds i32, ptr [[SRC]], i64 1
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; CHECK-NEXT: [[C_1_MIN:%.*]] = icmp ult ptr [[GEP_1]], [[MIN]]
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; CHECK-NEXT: [[C_1_MAX:%.*]] = icmp ult ptr [[GEP_1]], [[MAX]]
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; CHECK-NEXT: [[RES_2:%.*]] = xor i1 [[C_1_MIN]], [[C_1_MAX]]
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; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr inbounds i32, ptr [[SRC]], i64 2
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; CHECK-NEXT: [[C_2_MIN:%.*]] = icmp ult ptr [[GEP_2]], [[MIN]]
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; CHECK-NEXT: [[C_2_MAX:%.*]] = icmp ult ptr [[GEP_2]], [[MAX]]
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; CHECK-NEXT: [[RES_3:%.*]] = xor i1 [[C_2_MIN]], [[C_2_MAX]]
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; CHECK-NEXT: [[GEP_4:%.*]] = getelementptr inbounds i32, ptr [[SRC]], i64 4
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; CHECK-NEXT: [[C_4_MIN:%.*]] = icmp ult ptr [[GEP_4]], [[MIN]]
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; CHECK-NEXT: [[C_4_MAX:%.*]] = icmp ult ptr [[GEP_4]], [[MAX]]
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; CHECK-NEXT: [[RES_4:%.*]] = xor i1 [[C_4_MIN]], [[C_4_MAX]]
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; CHECK-NEXT: [[RES_5:%.*]] = xor i1 [[RES_1]], [[RES_2]]
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; CHECK-NEXT: [[RES_6:%.*]] = xor i1 [[RES_5]], [[RES_3]]
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; CHECK-NEXT: [[RES_7:%.*]] = xor i1 [[RES_6]], [[RES_4]]
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; CHECK-NEXT: ret i1 [[RES_7]]
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;
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check.0.min:
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%src.c = addrspacecast ptr %src to ptr addrspace(1)
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%min.c = addrspacecast ptr %min to ptr addrspace(1)
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%max.c = addrspacecast ptr %max to ptr addrspace(1)
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%gep.3 = getelementptr inbounds i32, ptr %src, i64 3
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%gep.3.c = addrspacecast ptr %gep.3 to ptr addrspace(1)
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%c.min.0 = icmp ult ptr addrspace(1) %src.c, %min.c
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%c.max.3 = icmp ugt ptr addrspace(1) %gep.3.c, %max.c
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%or = or i1 %c.min.0, %c.max.3
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br i1 %or, label %trap, label %checks
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trap:
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ret i1 0
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checks:
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%c.3.min = icmp ult ptr %gep.3, %min
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%c.3.max = icmp ult ptr %gep.3, %max
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%res.1 = xor i1 %c.3.min, %c.3.max
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%gep.1 = getelementptr inbounds i32, ptr %src, i64 1
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%c.1.min = icmp ult ptr %gep.1, %min
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%c.1.max = icmp ult ptr %gep.1, %max
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%res.2 = xor i1 %c.1.min, %c.1.max
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%gep.2 = getelementptr inbounds i32, ptr %src, i64 2
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%c.2.min = icmp ult ptr %gep.2, %min
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%c.2.max = icmp ult ptr %gep.2, %max
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%res.3 = xor i1 %c.2.min, %c.2.max
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%gep.4 = getelementptr inbounds i32, ptr %src, i64 4
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%c.4.min = icmp ult ptr %gep.4, %min
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%c.4.max = icmp ult ptr %gep.4, %max
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%res.4 = xor i1 %c.4.min, %c.4.max
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%res.5 = xor i1 %res.1, %res.2
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%res.6 = xor i1 %res.5, %res.3
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%res.7 = xor i1 %res.6, %res.4
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ret i1 %res.7
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}
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