115 lines
2.9 KiB
LLVM
115 lines
2.9 KiB
LLVM
; RUN: opt -simplifycfg -S < %s | FileCheck %s
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; We could hoist the div/rem in these tests because it's safe to do so.
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; PR31028 - https://bugs.llvm.org/show_bug.cgi?id=31028
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; ...but since there's a separate pass for that, don't bother.
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define i32 @hoist_sdiv(i32 %a, i32 %b) {
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; CHECK-LABEL: @hoist_sdiv(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[REM:%.*]] = srem i32 %a, %b
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[REM]], 42
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; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
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; CHECK: if:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 %a, %b
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; CHECK-NEXT: br label %end
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; CHECK: end:
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; CHECK-NEXT: [[RET:%.*]] = phi i32 [ [[DIV]], %if ], [ 3, %entry ]
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; CHECK-NEXT: ret i32 [[RET]]
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;
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entry:
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%rem = srem i32 %a, %b
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%cmp = icmp eq i32 %rem, 42
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br i1 %cmp, label %if, label %end
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if:
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%div = sdiv i32 %a, %b
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br label %end
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end:
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%ret = phi i32 [ %div, %if ], [ 3, %entry ]
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ret i32 %ret
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}
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define i64 @hoist_udiv(i64 %a, i64 %b) {
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; CHECK-LABEL: @hoist_udiv(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[REM:%.*]] = urem i64 %a, %b
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[REM]], 42
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; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
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; CHECK: if:
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; CHECK-NEXT: [[DIV:%.*]] = udiv i64 %a, %b
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; CHECK-NEXT: br label %end
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; CHECK: end:
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; CHECK-NEXT: [[RET:%.*]] = phi i64 [ [[DIV]], %if ], [ 3, %entry ]
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; CHECK-NEXT: ret i64 [[RET]]
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;
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entry:
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%rem = urem i64 %a, %b
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%cmp = icmp eq i64 %rem, 42
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br i1 %cmp, label %if, label %end
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if:
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%div = udiv i64 %a, %b
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br label %end
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end:
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%ret = phi i64 [ %div, %if ], [ 3, %entry ]
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ret i64 %ret
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}
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define i16 @hoist_srem(i16 %a, i16 %b) {
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; CHECK-LABEL: @hoist_srem(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i16 %a, %b
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[DIV]], 42
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; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
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; CHECK: if:
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; CHECK-NEXT: [[REM:%.*]] = srem i16 %a, %b
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; CHECK-NEXT: br label %end
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; CHECK: end:
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; CHECK-NEXT: [[RET:%.*]] = phi i16 [ [[REM]], %if ], [ 3, %entry ]
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; CHECK-NEXT: ret i16 [[RET]]
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;
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entry:
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%div = sdiv i16 %a, %b
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%cmp = icmp eq i16 %div, 42
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br i1 %cmp, label %if, label %end
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if:
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%rem = srem i16 %a, %b
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br label %end
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end:
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%ret = phi i16 [ %rem, %if ], [ 3, %entry ]
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ret i16 %ret
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}
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define i8 @hoist_urem(i8 %a, i8 %b) {
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; CHECK-LABEL: @hoist_urem(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[DIV:%.*]] = udiv i8 %a, %b
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[DIV]], 42
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; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
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; CHECK: if:
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; CHECK-NEXT: [[REM:%.*]] = urem i8 %a, %b
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; CHECK-NEXT: br label %end
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; CHECK: end:
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; CHECK-NEXT: [[RET:%.*]] = phi i8 [ [[REM]], %if ], [ 3, %entry ]
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; CHECK-NEXT: ret i8 [[RET]]
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;
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entry:
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%div = udiv i8 %a, %b
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%cmp = icmp eq i8 %div, 42
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br i1 %cmp, label %if, label %end
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if:
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%rem = urem i8 %a, %b
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br label %end
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end:
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%ret = phi i8 [ %rem, %if ], [ 3, %entry ]
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ret i8 %ret
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}
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