forked from OSchip/llvm-project
126 lines
4.0 KiB
LLVM
126 lines
4.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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;RUN: opt < %s -jump-threading -S | FileCheck %s
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declare void @bar(...)
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declare void @baz(...)
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; Make sure we thread the end of the bar block to the end of the function.
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define void @test1(i32 %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], 9
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_END_THREAD:%.*]], label [[IF_END:%.*]]
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; CHECK: if.end.thread:
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; CHECK-NEXT: call void (...) @bar()
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; CHECK-NEXT: br label [[IF_END4:%.*]]
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; CHECK: if.end:
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; CHECK-NEXT: [[X_OFF:%.*]] = add i32 [[X]], -3
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; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i32 [[X_OFF]], 5
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; CHECK-NEXT: br i1 [[TMP0]], label [[IF_THEN3:%.*]], label [[IF_END4]]
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; CHECK: if.then3:
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; CHECK-NEXT: call void (...) @baz()
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; CHECK-NEXT: br label [[IF_END4]]
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; CHECK: if.end4:
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; CHECK-NEXT: ret void
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;
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entry:
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%cmp = icmp sgt i32 %x, 9
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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call void (...) @bar()
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br label %if.end
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if.end: ; preds = %if.then, %entry
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%x.off = add i32 %x, -3
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%0 = icmp ult i32 %x.off, 5
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br i1 %0, label %if.then3, label %if.end4
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if.then3: ; preds = %if.end
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call void (...) @baz()
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br label %if.end4
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if.end4: ; preds = %if.then3, %if.end
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ret void
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}
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; Make sure we thread the false side of the first if to the end of the function.
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define void @test2(i32 %x) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[X:%.*]], 9
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_END:%.*]], label [[IF_END4:%.*]]
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; CHECK: if.end:
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; CHECK-NEXT: call void (...) @bar()
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; CHECK-NEXT: [[X_OFF:%.*]] = add i32 [[X]], -3
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; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i32 [[X_OFF]], 5
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; CHECK-NEXT: br i1 [[TMP0]], label [[IF_THEN3:%.*]], label [[IF_END4]]
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; CHECK: if.then3:
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; CHECK-NEXT: call void (...) @baz()
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; CHECK-NEXT: br label [[IF_END4]]
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; CHECK: if.end4:
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; CHECK-NEXT: ret void
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;
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entry:
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%cmp = icmp slt i32 %x, 9
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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call void (...) @bar()
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br label %if.end
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if.end: ; preds = %if.then, %entry
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%x.off = add i32 %x, -3
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%0 = icmp ult i32 %x.off, 5
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br i1 %0, label %if.then3, label %if.end4
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if.then3: ; preds = %if.end
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call void (...) @baz()
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br label %if.end4
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if.end4: ; preds = %if.then3, %if.end
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ret void
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}
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; Negative test to make sure we don't thread when the ranges overlap.
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define void @test3(i32 %x) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], 6
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: call void (...) @bar()
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; CHECK-NEXT: br label [[IF_END]]
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; CHECK: if.end:
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; CHECK-NEXT: [[X_OFF:%.*]] = add i32 [[X]], -3
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; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i32 [[X_OFF]], 5
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; CHECK-NEXT: br i1 [[TMP0]], label [[IF_THEN3:%.*]], label [[IF_END4:%.*]]
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; CHECK: if.then3:
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; CHECK-NEXT: call void (...) @baz()
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; CHECK-NEXT: br label [[IF_END4]]
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; CHECK: if.end4:
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; CHECK-NEXT: ret void
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;
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entry:
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%cmp = icmp sgt i32 %x, 6
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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call void (...) @bar()
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br label %if.end
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if.end: ; preds = %if.then, %entry
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%x.off = add i32 %x, -3
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%0 = icmp ult i32 %x.off, 5
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br i1 %0, label %if.then3, label %if.end4
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if.then3: ; preds = %if.end
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call void (...) @baz()
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br label %if.end4
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if.end4: ; preds = %if.then3, %if.end
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ret void
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}
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