571c713144
Handle the fact that not only constant expressions, but also constant aggregates containing expressions can trap. This still doesn't fix the original C reproducer, probably due to more issues remaining in other passes.
92 lines
3.0 KiB
LLVM
92 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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@G = extern_weak global i32
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; PR3354
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; Do not merge bb1 into the entry block, it might trap.
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define i32 @admiral(i32 %a, i32 %b) {
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; CHECK-LABEL: @admiral(
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; CHECK-NEXT: [[C:%.*]] = icmp sle i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: br i1 [[C]], label [[COMMON_RET:%.*]], label [[BB1:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[D:%.*]] = icmp sgt i32 sdiv (i32 -32768, i32 ptrtoint (i32* @G to i32)), 0
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[D]], i32 927, i32 42
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ 42, [[TMP0:%.*]] ], [ [[SPEC_SELECT]], [[BB1]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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;
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%c = icmp sle i32 %a, %b
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br i1 %c, label %bb2, label %bb1
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bb1:
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%d = icmp sgt i32 sdiv (i32 -32768, i32 ptrtoint (i32* @G to i32)), 0
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br i1 %d, label %bb6, label %bb2
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bb2:
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ret i32 42
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bb6:
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ret i32 927
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}
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define i32 @ackbar(i1 %c) {
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; CHECK-LABEL: @ackbar(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[BB5:%.*]], label [[COMMON_RET:%.*]]
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; CHECK: bb5:
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 icmp sgt (i32 sdiv (i32 32767, i32 ptrtoint (i32* @G to i32)), i32 0), i32 42, i32 927
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; CHECK-NEXT: br label [[COMMON_RET]]
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; CHECK: common.ret:
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi i32 [ 42, [[TMP0:%.*]] ], [ [[SPEC_SELECT]], [[BB5]] ]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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;
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br i1 %c, label %bb5, label %bb6
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bb5:
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br i1 icmp sgt (i32 sdiv (i32 32767, i32 ptrtoint (i32* @G to i32)), i32 0), label %bb6, label %bb7
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bb6:
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ret i32 42
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bb7:
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ret i32 927
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}
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; FP ops don't trap by default, so this is safe to hoist.
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define i32 @tarp(i1 %c) {
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; CHECK-LABEL: @tarp(
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; CHECK-NEXT: common.ret:
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; CHECK-NEXT: [[C_NOT:%.*]] = xor i1 [[C:%.*]], true
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; CHECK-NEXT: [[BRMERGE:%.*]] = or i1 [[C_NOT]], fcmp oeq (float fdiv (float 3.000000e+00, float sitofp (i32 ptrtoint (i32* @G to i32) to float)), float 1.000000e+00)
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = select i1 [[BRMERGE]], i32 42, i32 927
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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;
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br i1 %c, label %bb8, label %bb9
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bb8:
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br i1 fcmp oeq (float fdiv (float 3.0, float sitofp (i32 ptrtoint (i32* @G to i32) to float)), float 1.0), label %bb9, label %bb10
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bb9:
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ret i32 42
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bb10:
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ret i32 927
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}
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@g = external global i32
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define <1 x i64> @trapping_const_agg(i1 %c) {
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; CHECK-LABEL: @trapping_const_agg(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[END:%.*]]
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; CHECK: if:
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: [[PHI:%.*]] = phi <1 x i64> [ zeroinitializer, [[ENTRY:%.*]] ], [ <i64 srem (i64 1, i64 ptrtoint (i32* @g to i64))>, [[IF]] ]
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; CHECK-NEXT: ret <1 x i64> [[PHI]]
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;
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entry:
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br i1 %c, label %if, label %end
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if:
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br label %end
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end:
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%phi = phi <1 x i64> [ zeroinitializer, %entry ], [ <i64 srem (i64 1, i64 ptrtoint (i32* @g to i64))>, %if ]
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ret <1 x i64> %phi
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}
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