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TheRock/compiler/amd-llvm/llvm/test/CodeGen/Hexagon/expand-condsets-copy-lis.ll
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derek.holloway 7502bf64a4
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2026-09-02 16:34:47 -07:00

38 lines
1.2 KiB
LLVM

; RUN: llc -mtriple=hexagon < %s
; REQUIRES: asserts
; Test that the compiler doesn't assert because the live interval information
; isn't updated correctly during the Hexagon Expand Condsets pass. The pass
; wasn't updating the information when converting a mux with the same operands
; into a copy. When this occurs, the pass needs to update the liveness
; information for the predicate register, which is removed.
define void @f0(i32 %a0) unnamed_addr {
b0:
%v0 = or i32 undef, %a0
%v1 = or i32 undef, %v0
br label %b1
b1: ; preds = %b3, %b0
%v2 = phi i32 [ %v9, %b3 ], [ 0, %b0 ]
%v3 = phi i32 [ 0, %b3 ], [ %v1, %b0 ]
%v4 = srem i32 %v2, 4
%v5 = icmp eq i32 %v4, 0
%v6 = select i1 %v5, i32 %v1, i32 %v3
%v7 = shl i32 %v6, 8
%v8 = add i32 0, %v7
br i1 undef, label %b2, label %b3
b2: ; preds = %b1
store i32 %v8, ptr undef, align 4
br label %b3
b3: ; preds = %b2, %b1
%v9 = add nuw nsw i32 %v2, 1
%v10 = icmp slt i32 %v9, undef
br i1 %v10, label %b1, label %b4
b4: ; preds = %b3
unreachable
}