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TheRock/compiler/amd-llvm/llvm/test/Transforms/SimplifyCFG/RISCV/select-trunc-i64.ll
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

29 lines
1014 B
LLVM

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