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llvm-mirror/test/CodeGen/X86/testb-je-fusion.ll
Jay Foad 3f23d4b8c3 [MachineScheduler] Fix the TopDepth/BotHeightReduce latency heuristics 
tryLatency compares two sched candidates. For the top zone it prefers
the one with lesser depth, but only if that depth is greater than the
total latency of the instructions we've already scheduled -- otherwise
its latency would be hidden and there would be no stall.

Unfortunately it only tests the depth of one of the candidates. This can
lead to situations where the TopDepthReduce heuristic does not kick in,
but a lower priority heuristic chooses the other candidate, whose depth
*is* greater than the already scheduled latency, which causes a stall.

The fix is to apply the heuristic if the depth of *either* candidate is
greater than the already scheduled latency.

All this also applies to the BotHeightReduce heuristic in the bottom
zone.

Differential Revision: https://reviews.llvm.org/D72392
2020-07-17 11:02:13 +01:00

385 lines
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-- -mattr=-macrofusion,-branchfusion -post-RA-scheduler=0 | FileCheck %s --check-prefix=NOFUSION_NOPOSTRA
; RUN: llc < %s -mtriple=x86_64-- -mattr=-macrofusion,+branchfusion -post-RA-scheduler=0 | FileCheck %s --check-prefix=BRANCHFUSION_NOPOSTRA --check-prefix=BRANCHFUSIONONLY_NOPOSTRA
; RUN: llc < %s -mtriple=x86_64-- -mattr=+macrofusion,-branchfusion -post-RA-scheduler=0 | FileCheck %s --check-prefix=BRANCHFUSION_NOPOSTRA --check-prefix=MACROFUSION_NOPOSTRA
; RUN: llc < %s -mtriple=x86_64-- -mattr=-macrofusion,-branchfusion -post-RA-scheduler=1 | FileCheck %s --check-prefix=NOFUSION_POSTRA
; RUN: llc < %s -mtriple=x86_64-- -mattr=-macrofusion,+branchfusion -post-RA-scheduler=1 | FileCheck %s --check-prefix=BRANCHFUSION_POSTRA --check-prefix=BRANCHFUSIONONLY_POSTRA
; RUN: llc < %s -mtriple=x86_64-- -mattr=+macrofusion,-branchfusion -post-RA-scheduler=1 | FileCheck %s --check-prefix=BRANCHFUSION_POSTRA --check-prefix=MACROFUSION_POSTRA
; RUN: llc < %s -mtriple=x86_64-- -mattr=-macrofusion,-branchfusion -enable-misched=0 -misched-postra=1 -enable-post-misched | FileCheck %s --check-prefix=NOFUSION_MISCHEDPOSTRA
; RUN: llc < %s -mtriple=x86_64-- -mattr=-macrofusion,+branchfusion -enable-misched=0 -misched-postra=1 -enable-post-misched | FileCheck %s --check-prefix=BRANCHFUSION_MISCHEDPOSTRA --check-prefix=BRANCHFUSIONONLY_MISCHEDPOSTRA
; RUN: llc < %s -mtriple=x86_64-- -mattr=+macrofusion,-branchfusion -enable-misched=0 -misched-postra=1 -enable-post-misched | FileCheck %s --check-prefix=BRANCHFUSION_MISCHEDPOSTRA --check-prefix=MACROFUSION_MISCHEDPOSTRA
; testb should be scheduled right before je to enable macro-fusion.
define i32 @macrofuse_test_je(i32 %flags, i8* %p) nounwind {
; NOFUSION_NOPOSTRA-LABEL: macrofuse_test_je:
; NOFUSION_NOPOSTRA: # %bb.0: # %entry
; NOFUSION_NOPOSTRA-NEXT: xorl %eax, %eax
; NOFUSION_NOPOSTRA-NEXT: testl $512, %edi # imm = 0x200
; NOFUSION_NOPOSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_NOPOSTRA-NEXT: je .LBB0_2
; NOFUSION_NOPOSTRA-NEXT: # %bb.1: # %if.then
; NOFUSION_NOPOSTRA-NEXT: movl $1, %eax
; NOFUSION_NOPOSTRA-NEXT: .LBB0_2: # %if.end
; NOFUSION_NOPOSTRA-NEXT: retq
;
; BRANCHFUSION_NOPOSTRA-LABEL: macrofuse_test_je:
; BRANCHFUSION_NOPOSTRA: # %bb.0: # %entry
; BRANCHFUSION_NOPOSTRA-NEXT: xorl %eax, %eax
; BRANCHFUSION_NOPOSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSION_NOPOSTRA-NEXT: testl $512, %edi # imm = 0x200
; BRANCHFUSION_NOPOSTRA-NEXT: je .LBB0_2
; BRANCHFUSION_NOPOSTRA-NEXT: # %bb.1: # %if.then
; BRANCHFUSION_NOPOSTRA-NEXT: movl $1, %eax
; BRANCHFUSION_NOPOSTRA-NEXT: .LBB0_2: # %if.end
; BRANCHFUSION_NOPOSTRA-NEXT: retq
;
; NOFUSION_POSTRA-LABEL: macrofuse_test_je:
; NOFUSION_POSTRA: # %bb.0: # %entry
; NOFUSION_POSTRA-NEXT: xorl %eax, %eax
; NOFUSION_POSTRA-NEXT: testl $512, %edi # imm = 0x200
; NOFUSION_POSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_POSTRA-NEXT: je .LBB0_2
; NOFUSION_POSTRA-NEXT: # %bb.1: # %if.then
; NOFUSION_POSTRA-NEXT: movl $1, %eax
; NOFUSION_POSTRA-NEXT: .LBB0_2: # %if.end
; NOFUSION_POSTRA-NEXT: retq
;
; BRANCHFUSION_POSTRA-LABEL: macrofuse_test_je:
; BRANCHFUSION_POSTRA: # %bb.0: # %entry
; BRANCHFUSION_POSTRA-NEXT: xorl %eax, %eax
; BRANCHFUSION_POSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSION_POSTRA-NEXT: testl $512, %edi # imm = 0x200
; BRANCHFUSION_POSTRA-NEXT: je .LBB0_2
; BRANCHFUSION_POSTRA-NEXT: # %bb.1: # %if.then
; BRANCHFUSION_POSTRA-NEXT: movl $1, %eax
; BRANCHFUSION_POSTRA-NEXT: .LBB0_2: # %if.end
; BRANCHFUSION_POSTRA-NEXT: retq
;
; NOFUSION_MISCHEDPOSTRA-LABEL: macrofuse_test_je:
; NOFUSION_MISCHEDPOSTRA: # %bb.0: # %entry
; NOFUSION_MISCHEDPOSTRA-NEXT: xorl %eax, %eax
; NOFUSION_MISCHEDPOSTRA-NEXT: testl $512, %edi # imm = 0x200
; NOFUSION_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_MISCHEDPOSTRA-NEXT: je .LBB0_2
; NOFUSION_MISCHEDPOSTRA-NEXT: # %bb.1: # %if.then
; NOFUSION_MISCHEDPOSTRA-NEXT: movl $1, %eax
; NOFUSION_MISCHEDPOSTRA-NEXT: .LBB0_2: # %if.end
; NOFUSION_MISCHEDPOSTRA-NEXT: retq
;
; BRANCHFUSION_MISCHEDPOSTRA-LABEL: macrofuse_test_je:
; BRANCHFUSION_MISCHEDPOSTRA: # %bb.0: # %entry
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: xorl %eax, %eax
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: testl $512, %edi # imm = 0x200
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: je .LBB0_2
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: # %bb.1: # %if.then
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: movl $1, %eax
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: .LBB0_2: # %if.end
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: retq
entry:
%and = and i32 %flags, 512
%tobool = icmp eq i32 %and, 0
store i8 1, i8* %p
br i1 %tobool, label %if.end, label %if.then
if.then:
br label %if.end
if.end:
%hasflag = phi i32 [ 1, %if.then ], [ 0, %entry ]
ret i32 %hasflag
}
define i32 @macrofuse_cmp_je(i32 %flags, i8* %p) nounwind {
; NOFUSION_NOPOSTRA-LABEL: macrofuse_cmp_je:
; NOFUSION_NOPOSTRA: # %bb.0: # %entry
; NOFUSION_NOPOSTRA-NEXT: cmpl $512, %edi # imm = 0x200
; NOFUSION_NOPOSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_NOPOSTRA-NEXT: je .LBB1_1
; NOFUSION_NOPOSTRA-NEXT: # %bb.2: # %if.then
; NOFUSION_NOPOSTRA-NEXT: movl $1, %eax
; NOFUSION_NOPOSTRA-NEXT: retq
; NOFUSION_NOPOSTRA-NEXT: .LBB1_1:
; NOFUSION_NOPOSTRA-NEXT: xorl %eax, %eax
; NOFUSION_NOPOSTRA-NEXT: retq
;
; BRANCHFUSION_NOPOSTRA-LABEL: macrofuse_cmp_je:
; BRANCHFUSION_NOPOSTRA: # %bb.0: # %entry
; BRANCHFUSION_NOPOSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSION_NOPOSTRA-NEXT: cmpl $512, %edi # imm = 0x200
; BRANCHFUSION_NOPOSTRA-NEXT: je .LBB1_1
; BRANCHFUSION_NOPOSTRA-NEXT: # %bb.2: # %if.then
; BRANCHFUSION_NOPOSTRA-NEXT: movl $1, %eax
; BRANCHFUSION_NOPOSTRA-NEXT: retq
; BRANCHFUSION_NOPOSTRA-NEXT: .LBB1_1:
; BRANCHFUSION_NOPOSTRA-NEXT: xorl %eax, %eax
; BRANCHFUSION_NOPOSTRA-NEXT: retq
;
; NOFUSION_POSTRA-LABEL: macrofuse_cmp_je:
; NOFUSION_POSTRA: # %bb.0: # %entry
; NOFUSION_POSTRA-NEXT: cmpl $512, %edi # imm = 0x200
; NOFUSION_POSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_POSTRA-NEXT: je .LBB1_1
; NOFUSION_POSTRA-NEXT: # %bb.2: # %if.then
; NOFUSION_POSTRA-NEXT: movl $1, %eax
; NOFUSION_POSTRA-NEXT: retq
; NOFUSION_POSTRA-NEXT: .LBB1_1:
; NOFUSION_POSTRA-NEXT: xorl %eax, %eax
; NOFUSION_POSTRA-NEXT: retq
;
; BRANCHFUSION_POSTRA-LABEL: macrofuse_cmp_je:
; BRANCHFUSION_POSTRA: # %bb.0: # %entry
; BRANCHFUSION_POSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSION_POSTRA-NEXT: cmpl $512, %edi # imm = 0x200
; BRANCHFUSION_POSTRA-NEXT: je .LBB1_1
; BRANCHFUSION_POSTRA-NEXT: # %bb.2: # %if.then
; BRANCHFUSION_POSTRA-NEXT: movl $1, %eax
; BRANCHFUSION_POSTRA-NEXT: retq
; BRANCHFUSION_POSTRA-NEXT: .LBB1_1:
; BRANCHFUSION_POSTRA-NEXT: xorl %eax, %eax
; BRANCHFUSION_POSTRA-NEXT: retq
;
; NOFUSION_MISCHEDPOSTRA-LABEL: macrofuse_cmp_je:
; NOFUSION_MISCHEDPOSTRA: # %bb.0: # %entry
; NOFUSION_MISCHEDPOSTRA-NEXT: cmpl $512, %edi # imm = 0x200
; NOFUSION_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_MISCHEDPOSTRA-NEXT: je .LBB1_1
; NOFUSION_MISCHEDPOSTRA-NEXT: # %bb.2: # %if.then
; NOFUSION_MISCHEDPOSTRA-NEXT: movl $1, %eax
; NOFUSION_MISCHEDPOSTRA-NEXT: retq
; NOFUSION_MISCHEDPOSTRA-NEXT: .LBB1_1:
; NOFUSION_MISCHEDPOSTRA-NEXT: xorl %eax, %eax
; NOFUSION_MISCHEDPOSTRA-NEXT: retq
;
; BRANCHFUSION_MISCHEDPOSTRA-LABEL: macrofuse_cmp_je:
; BRANCHFUSION_MISCHEDPOSTRA: # %bb.0: # %entry
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: cmpl $512, %edi # imm = 0x200
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: je .LBB1_1
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: # %bb.2: # %if.then
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: movl $1, %eax
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: retq
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: .LBB1_1:
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: xorl %eax, %eax
; BRANCHFUSION_MISCHEDPOSTRA-NEXT: retq
entry:
%sub = sub i32 %flags, 512
%tobool = icmp eq i32 %sub, 0
store i8 1, i8* %p
br i1 %tobool, label %if.end, label %if.then
if.then:
br label %if.end
if.end:
%hasflag = phi i32 [ 1, %if.then ], [ 0, %entry ]
ret i32 %hasflag
}
define i32 @macrofuse_alu_je(i32 %flags, i8* %p) nounwind {
; NOFUSION_NOPOSTRA-LABEL: macrofuse_alu_je:
; NOFUSION_NOPOSTRA: # %bb.0: # %entry
; NOFUSION_NOPOSTRA-NEXT: movl %edi, %eax
; NOFUSION_NOPOSTRA-NEXT: addl $-512, %eax # imm = 0xFE00
; NOFUSION_NOPOSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_NOPOSTRA-NEXT: je .LBB2_2
; NOFUSION_NOPOSTRA-NEXT: # %bb.1: # %if.then
; NOFUSION_NOPOSTRA-NEXT: movl $1, %eax
; NOFUSION_NOPOSTRA-NEXT: .LBB2_2: # %if.end
; NOFUSION_NOPOSTRA-NEXT: retq
;
; BRANCHFUSIONONLY_NOPOSTRA-LABEL: macrofuse_alu_je:
; BRANCHFUSIONONLY_NOPOSTRA: # %bb.0: # %entry
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: movl %edi, %eax
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: addl $-512, %eax # imm = 0xFE00
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: je .LBB2_2
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: # %bb.1: # %if.then
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: movl $1, %eax
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: .LBB2_2: # %if.end
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: retq
;
; MACROFUSION_NOPOSTRA-LABEL: macrofuse_alu_je:
; MACROFUSION_NOPOSTRA: # %bb.0: # %entry
; MACROFUSION_NOPOSTRA-NEXT: movl %edi, %eax
; MACROFUSION_NOPOSTRA-NEXT: movb $1, (%rsi)
; MACROFUSION_NOPOSTRA-NEXT: addl $-512, %eax # imm = 0xFE00
; MACROFUSION_NOPOSTRA-NEXT: je .LBB2_2
; MACROFUSION_NOPOSTRA-NEXT: # %bb.1: # %if.then
; MACROFUSION_NOPOSTRA-NEXT: movl $1, %eax
; MACROFUSION_NOPOSTRA-NEXT: .LBB2_2: # %if.end
; MACROFUSION_NOPOSTRA-NEXT: retq
;
; NOFUSION_POSTRA-LABEL: macrofuse_alu_je:
; NOFUSION_POSTRA: # %bb.0: # %entry
; NOFUSION_POSTRA-NEXT: movl %edi, %eax
; NOFUSION_POSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_POSTRA-NEXT: addl $-512, %eax # imm = 0xFE00
; NOFUSION_POSTRA-NEXT: je .LBB2_2
; NOFUSION_POSTRA-NEXT: # %bb.1: # %if.then
; NOFUSION_POSTRA-NEXT: movl $1, %eax
; NOFUSION_POSTRA-NEXT: .LBB2_2: # %if.end
; NOFUSION_POSTRA-NEXT: retq
;
; BRANCHFUSION_POSTRA-LABEL: macrofuse_alu_je:
; BRANCHFUSION_POSTRA: # %bb.0: # %entry
; BRANCHFUSION_POSTRA-NEXT: movl %edi, %eax
; BRANCHFUSION_POSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSION_POSTRA-NEXT: addl $-512, %eax # imm = 0xFE00
; BRANCHFUSION_POSTRA-NEXT: je .LBB2_2
; BRANCHFUSION_POSTRA-NEXT: # %bb.1: # %if.then
; BRANCHFUSION_POSTRA-NEXT: movl $1, %eax
; BRANCHFUSION_POSTRA-NEXT: .LBB2_2: # %if.end
; BRANCHFUSION_POSTRA-NEXT: retq
;
; NOFUSION_MISCHEDPOSTRA-LABEL: macrofuse_alu_je:
; NOFUSION_MISCHEDPOSTRA: # %bb.0: # %entry
; NOFUSION_MISCHEDPOSTRA-NEXT: movl %edi, %eax
; NOFUSION_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_MISCHEDPOSTRA-NEXT: addl $-512, %eax # imm = 0xFE00
; NOFUSION_MISCHEDPOSTRA-NEXT: je .LBB2_2
; NOFUSION_MISCHEDPOSTRA-NEXT: # %bb.1: # %if.then
; NOFUSION_MISCHEDPOSTRA-NEXT: movl $1, %eax
; NOFUSION_MISCHEDPOSTRA-NEXT: .LBB2_2: # %if.end
; NOFUSION_MISCHEDPOSTRA-NEXT: retq
;
; BRANCHFUSIONONLY_MISCHEDPOSTRA-LABEL: macrofuse_alu_je:
; BRANCHFUSIONONLY_MISCHEDPOSTRA: # %bb.0: # %entry
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: movl %edi, %eax
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: addl $-512, %eax # imm = 0xFE00
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: je .LBB2_2
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: # %bb.1: # %if.then
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: movl $1, %eax
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: .LBB2_2: # %if.end
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: retq
;
; MACROFUSION_MISCHEDPOSTRA-LABEL: macrofuse_alu_je:
; MACROFUSION_MISCHEDPOSTRA: # %bb.0: # %entry
; MACROFUSION_MISCHEDPOSTRA-NEXT: movl %edi, %eax
; MACROFUSION_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; MACROFUSION_MISCHEDPOSTRA-NEXT: addl $-512, %eax # imm = 0xFE00
; MACROFUSION_MISCHEDPOSTRA-NEXT: je .LBB2_2
; MACROFUSION_MISCHEDPOSTRA-NEXT: # %bb.1: # %if.then
; MACROFUSION_MISCHEDPOSTRA-NEXT: movl $1, %eax
; MACROFUSION_MISCHEDPOSTRA-NEXT: .LBB2_2: # %if.end
; MACROFUSION_MISCHEDPOSTRA-NEXT: retq
entry:
%sub = sub i32 %flags, 512
%tobool = icmp eq i32 %sub, 0
store i8 1, i8* %p
br i1 %tobool, label %if.end, label %if.then
if.then:
br label %if.end
if.end:
%hasflag = phi i32 [ 1, %if.then ], [ %sub, %entry ]
ret i32 %hasflag
}
define i32 @macrofuse_dec_je(i32 %flags, i8* %p) nounwind {
; NOFUSION_NOPOSTRA-LABEL: macrofuse_dec_je:
; NOFUSION_NOPOSTRA: # %bb.0: # %entry
; NOFUSION_NOPOSTRA-NEXT: movl %edi, %eax
; NOFUSION_NOPOSTRA-NEXT: decl %eax
; NOFUSION_NOPOSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_NOPOSTRA-NEXT: je .LBB3_2
; NOFUSION_NOPOSTRA-NEXT: # %bb.1: # %if.then
; NOFUSION_NOPOSTRA-NEXT: movl $1, %eax
; NOFUSION_NOPOSTRA-NEXT: .LBB3_2: # %if.end
; NOFUSION_NOPOSTRA-NEXT: retq
;
; BRANCHFUSIONONLY_NOPOSTRA-LABEL: macrofuse_dec_je:
; BRANCHFUSIONONLY_NOPOSTRA: # %bb.0: # %entry
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: movl %edi, %eax
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: decl %eax
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: je .LBB3_2
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: # %bb.1: # %if.then
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: movl $1, %eax
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: .LBB3_2: # %if.end
; BRANCHFUSIONONLY_NOPOSTRA-NEXT: retq
;
; MACROFUSION_NOPOSTRA-LABEL: macrofuse_dec_je:
; MACROFUSION_NOPOSTRA: # %bb.0: # %entry
; MACROFUSION_NOPOSTRA-NEXT: movl %edi, %eax
; MACROFUSION_NOPOSTRA-NEXT: movb $1, (%rsi)
; MACROFUSION_NOPOSTRA-NEXT: decl %eax
; MACROFUSION_NOPOSTRA-NEXT: je .LBB3_2
; MACROFUSION_NOPOSTRA-NEXT: # %bb.1: # %if.then
; MACROFUSION_NOPOSTRA-NEXT: movl $1, %eax
; MACROFUSION_NOPOSTRA-NEXT: .LBB3_2: # %if.end
; MACROFUSION_NOPOSTRA-NEXT: retq
;
; NOFUSION_POSTRA-LABEL: macrofuse_dec_je:
; NOFUSION_POSTRA: # %bb.0: # %entry
; NOFUSION_POSTRA-NEXT: movl %edi, %eax
; NOFUSION_POSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_POSTRA-NEXT: decl %eax
; NOFUSION_POSTRA-NEXT: je .LBB3_2
; NOFUSION_POSTRA-NEXT: # %bb.1: # %if.then
; NOFUSION_POSTRA-NEXT: movl $1, %eax
; NOFUSION_POSTRA-NEXT: .LBB3_2: # %if.end
; NOFUSION_POSTRA-NEXT: retq
;
; BRANCHFUSION_POSTRA-LABEL: macrofuse_dec_je:
; BRANCHFUSION_POSTRA: # %bb.0: # %entry
; BRANCHFUSION_POSTRA-NEXT: movl %edi, %eax
; BRANCHFUSION_POSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSION_POSTRA-NEXT: decl %eax
; BRANCHFUSION_POSTRA-NEXT: je .LBB3_2
; BRANCHFUSION_POSTRA-NEXT: # %bb.1: # %if.then
; BRANCHFUSION_POSTRA-NEXT: movl $1, %eax
; BRANCHFUSION_POSTRA-NEXT: .LBB3_2: # %if.end
; BRANCHFUSION_POSTRA-NEXT: retq
;
; NOFUSION_MISCHEDPOSTRA-LABEL: macrofuse_dec_je:
; NOFUSION_MISCHEDPOSTRA: # %bb.0: # %entry
; NOFUSION_MISCHEDPOSTRA-NEXT: movl %edi, %eax
; NOFUSION_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; NOFUSION_MISCHEDPOSTRA-NEXT: decl %eax
; NOFUSION_MISCHEDPOSTRA-NEXT: je .LBB3_2
; NOFUSION_MISCHEDPOSTRA-NEXT: # %bb.1: # %if.then
; NOFUSION_MISCHEDPOSTRA-NEXT: movl $1, %eax
; NOFUSION_MISCHEDPOSTRA-NEXT: .LBB3_2: # %if.end
; NOFUSION_MISCHEDPOSTRA-NEXT: retq
;
; BRANCHFUSIONONLY_MISCHEDPOSTRA-LABEL: macrofuse_dec_je:
; BRANCHFUSIONONLY_MISCHEDPOSTRA: # %bb.0: # %entry
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: movl %edi, %eax
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: decl %eax
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: je .LBB3_2
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: # %bb.1: # %if.then
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: movl $1, %eax
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: .LBB3_2: # %if.end
; BRANCHFUSIONONLY_MISCHEDPOSTRA-NEXT: retq
;
; MACROFUSION_MISCHEDPOSTRA-LABEL: macrofuse_dec_je:
; MACROFUSION_MISCHEDPOSTRA: # %bb.0: # %entry
; MACROFUSION_MISCHEDPOSTRA-NEXT: movl %edi, %eax
; MACROFUSION_MISCHEDPOSTRA-NEXT: movb $1, (%rsi)
; MACROFUSION_MISCHEDPOSTRA-NEXT: decl %eax
; MACROFUSION_MISCHEDPOSTRA-NEXT: je .LBB3_2
; MACROFUSION_MISCHEDPOSTRA-NEXT: # %bb.1: # %if.then
; MACROFUSION_MISCHEDPOSTRA-NEXT: movl $1, %eax
; MACROFUSION_MISCHEDPOSTRA-NEXT: .LBB3_2: # %if.end
; MACROFUSION_MISCHEDPOSTRA-NEXT: retq
entry:
%sub = sub i32 %flags, 1
%tobool = icmp eq i32 %sub, 0
store i8 1, i8* %p
br i1 %tobool, label %if.end, label %if.then
if.then:
br label %if.end
if.end:
%hasflag = phi i32 [ 1, %if.then ], [ %sub, %entry ]
ret i32 %hasflag
}
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