29 lines
1007 B
LLVM
29 lines
1007 B
LLVM
;RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -mtriple=riscv32 < %s | FileCheck %s
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; Test case taken from test/Transforms/SimplifyCFG/ARM/select-trunc-i64.ll.
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; A correct implementation of isTruncateFree allows this test case to be
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; reduced to a single basic block.
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; CHECK-LABEL: select_trunc_i64
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; CHECK-NOT: br
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; CHECK: select
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; CHECK: select
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define i32 @select_trunc_i64(i32 %a, i32 %b) {
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entry:
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%conv = sext i32 %a to i64
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%conv1 = sext i32 %b to i64
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%add = add nsw i64 %conv1, %conv
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%cmp = icmp sgt i64 %add, 2147483647
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br i1 %cmp, label %cond.end7, label %cond.false
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cond.false: ; preds = %entry
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%0 = icmp sgt i64 %add, -2147483648
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%cond = select i1 %0, i64 %add, i64 -2147483648
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%extract.t = trunc i64 %cond to i32
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br label %cond.end7
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cond.end7: ; preds = %cond.false, %entry
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%cond8.off0 = phi i32 [ 2147483647, %entry ], [ %extract.t, %cond.false ]
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ret i32 %cond8.off0
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}
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